A release to the land and waters of the state shall be remediated to the applicable standards identified in the RBCRs. Upon achieving such standard, a release remediation closure report that complies with the requirements of this section shall be prepared using a form prescribed by the commissioner, and shall be submitted to the commissioner if submission is required pursuant to subdivision (3) of this section. A release remediation closure report shall:

1. (1) Include the following information:

   1. (A) The name, mailing address, electronic mail address, and telephone number of each creator or maintainer of the release;
   2. (B) The location of the release, including the property address;
   3. (C) The date on which the release was discovered;
   4. (D) The date on which the release was reported to the commissioner, if the reporting of such release was required by the RBCRs or regulations adopted pursuant to section 22a-450 of the Connecticut General Statutes;
   5. (E) The date on which the first tier assignment for such release was submitted to the commissioner, if such an assignment was required by section 22a-134tt-6 of the RBCRs; and(F) Any other information specified by the form prescribed by the commissioner, including, but not limited to, any release records or supporting documentation required to be prepared by the RBCRs.
2. (2) Be verified by an LEP or, if authorized by sections 22a-134tt-7 and 22a-134tt-8(a)(2) of the RBCRs, certified by a PEP, pursuant to section 22a-134tt-8(b) of the RBCRs;

3. (3) Be submitted to the commissioner if:

   1. (A) The release is an emergent reportable release; or(B) The release was required to be reported to the commissioner pursuant to section 22a-134tt-3 of the RBCRs;
4. (4) Be retained by the person who created or maintained such release for not less than 10 years, and, if not submitted previously to the commissioner, be submitted to the commissioner not more than 30 days following a request in writing for submission; and
5. (5) Unless rejected by the department pursuant to section 22a-134tt-13 of the RBCRs, indicate that a release has been remediated to the standards specified by Chapter 445b of the Connecticut General Statutes and that, if the land and waters of the state impacted by such release remains in the condition and subject to the controls specified by the release remediation closure report, no further action regarding such release shall be required.

(Effective March 1, 2026)